
ST7263
I/O PORTS (Cont’d)
5.1.6 Port C
Table 12. Port C Description
PORT C
PC0
PC1
Input*
with pull-up
with pull-up
I/O
Output
push-pull
push-pull
PC2
with pull-up
push-pull
*Reset State
Alternate Function
Signal
Condition
RDI (SCI input)
TDO (SCI output)
SCI enable
USBOE (USB output ena- USBOE =1
ble)
(MISCR)
Figure 21. Port C Configuration
ALTERNATE 1
OUTPUT
0
DR
LATCH
DDR
LATCH
DDR SEL
DR SEL
1
0
ALTERNATE INPUT
ALTERNATE ENABLE
VDD
ALTERNATE ENABLE
P-BUFFER
PULL-UP
VDD
PAD
N-BUFFER
ALTERNATE ENABLE
VSS
CMOS SCHMITT TRIGGER
DIODES
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